org.eclipse.cdt.debug.edc.tests/src/org/eclipse/cdt/debug/edc/tests/TestReflectionHelper.java

/*
 * Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
 * All rights reserved.
 * This software, including documentation is protected by copyright controlled
 * by Nokia Corporation. Copying, including reproducing, storing, adapting or
 * translating, any or all of this material can only be done in accordance
 * with the Nokia Symbian License version 1.0 (or any subsequent update) or
 * any other license terms expressly agreed between you and Nokia.
 * This material contains Nokia's confidential information which
 * may not be disclosed to others without the prior written consent of Nokia.
 *
 * Initial Contributors:
 * Nokia Corporation - initial contribution.
 *
 * Contributors:
 *
 * Description: 
 *
 */

package org.eclipse.cdt.debug.edc.tests;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class TestReflectionHelper {

	public static Object getPrivateField(final String fieldName, final Object o)
			throws NoSuchFieldException, IllegalAccessException {
		Class<?> c = o.getClass();
		Field f = c.getDeclaredField(fieldName);
		f.setAccessible(true);
		return f.get(o);
	}

	public static boolean privateStringEquality(final String left,
			final String rightFieldName, final Object o)
			throws SecurityException, IllegalArgumentException,
			NoSuchFieldException, IllegalAccessException {
		return left.equals(getPrivateField(rightFieldName, o));
	}

	public static String stringFromPrivateFunction(final Object o,
			final String funcName) throws NoSuchMethodException,
			IllegalAccessException, InvocationTargetException {
		Class<?> c = o.getClass();
		Method m = c.getDeclaredMethod(funcName, (Class<?>[]) null);
		if (!m.getReturnType().equals(String.class))
			throw new IllegalArgumentException("member function '" + funcName + "' must return type String");
		m.setAccessible(true);
		return (String)m.invoke(o, (Object[])null);
	}

	private static Class<?>[] getArgClasses(final Object[] argList) {
		Class<?>[] argClasses = null;
		if (argList != null && argList.length > 0) {
			argClasses = new Class<?>[argList.length];
			for (int i = 0 ; i < argList.length; ++i) {
				argClasses[i] = argList[i].getClass();
			}
		}
		return argClasses;
	}

	public static Object objectFromPrivateFunctionWithArgs(
			final Object o, final String funcName, final Object[] argList) 
			throws NoSuchMethodException, IllegalAccessException,
			InvocationTargetException {
		return objectFromPrivateFunctionWithArgs(o, funcName, argList, getArgClasses(argList));
	}

	public static Object objectFromPrivateFunctionWithArgs(
			final Object o, final Class<?> c, final String funcName, final Object[] argList) 
			throws NoSuchMethodException, IllegalAccessException,
			InvocationTargetException {
		return objectFromPrivateFunctionWithArgs(o, c, funcName, argList, getArgClasses(argList));
	}

	public static Object objectFromPrivateFunctionWithArgs(
			final Object o, final String funcName, 
			final Object[] argList, final Class<?>[] argClasses)
			throws NoSuchMethodException, IllegalAccessException,
			InvocationTargetException {
		Class<?> c = o.getClass();
		return objectFromPrivateFunctionWithArgs(o, c, funcName, argList, argClasses);
	}

	public static Object objectFromPrivateFunctionWithArgs(
			final Object o, final Class<?> c, final String funcName, 
			final Object[] argList, final Class<?>[] argClasses)
			throws NoSuchMethodException, IllegalAccessException,
			InvocationTargetException {
		Method m = c.getDeclaredMethod(funcName, argClasses);
		m.setAccessible(true);
		return m.invoke(o, argList);
	}
}